A person has stopped breathing and receiving pulmonary resuscitation better pure oxygen or carbon dioxide?

Pure oxygen is better for pulmonary resuscitation than carbon dioxide.

When a person stops breathing, their body is no longer able to take in oxygen and expel carbon dioxide. This can lead to a buildup of carbon dioxide in the blood, which can cause the heart to stop beating and lead to death.

By providing pure oxygen, we can help to oxygenate the blood and remove the carbon dioxide that has built up. This can help to restart the heart and save the person's life.

On the other hand, providing carbon dioxide would only worsen the situation by further increasing the levels of carbon dioxide in the blood. This could make it more difficult for the person to breathe and could lead to death.

Therefore, pure oxygen is the better choice for pulmonary resuscitation.